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Home >> Mitsubishi >> 1991 >> Eclipse Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Disc) >> Testing >> Power Brake Unit >> System Check
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System Check

WARNING: This page is about a different car, the 1991 Mitsubishi 3000GT and 1991 Dodge Stealth. However, it is still accessible from the selected car via links, so may be relevant.
  1. Run engine for 2 minutes, and shut it off. Depress brake pedal several times with normal pressure. If pedal height gradually becomes higher with successive applications, power brake unit is okay. If pedal height remains steady, power brake unit is faulty.
  2. With engine stopped, depress brake pedal repeatedly until it's height no longer falls. Hold brake pedal down, and start engine. If pedal moves downward slightly, power brake unit is okay. If pedal height does not change, power brake unit is faulty.
  3. With engine running, press and hold brake pedal and shut off engine. Hold brake pedal for 30 seconds. Brake pedal height should not change. If pedal height falls, power brake unit is faulty.
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